From f1e51ec3a5b3ed54dec054aa422fdd7a81b078b3 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Tue, 18 Apr 2017 15:05:59 -0400
Subject: Tests: Fix CMakeTestAllGenerators generator list

Since `cmake --help` output now uses `[arch]` placeholders for the VS
generators, this test has been extracting invalid generator names.
Switch to using `cmake -E capabilities` to get a more robust listing of
the generators that does not depend on parsing human-readable help
output.
---
 Tests/CMakeTestAllGenerators/RunCMake.cmake | 35 +++++++----------------------
 1 file changed, 8 insertions(+), 27 deletions(-)

diff --git a/Tests/CMakeTestAllGenerators/RunCMake.cmake b/Tests/CMakeTestAllGenerators/RunCMake.cmake
index 6d27d3b..768c689 100644
--- a/Tests/CMakeTestAllGenerators/RunCMake.cmake
+++ b/Tests/CMakeTestAllGenerators/RunCMake.cmake
@@ -9,42 +9,23 @@ endif()
 # Analyze 'cmake --help' output for list of available generators:
 #
 execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${dir})
-execute_process(COMMAND ${CMAKE_COMMAND} --help
+execute_process(COMMAND ${CMAKE_COMMAND} -E capabilities
   RESULT_VARIABLE result
   OUTPUT_VARIABLE stdout
   ERROR_VARIABLE stderr
   WORKING_DIRECTORY ${dir})
 
-string(REPLACE ";" "\\;" stdout "${stdout}")
-string(REPLACE "\n" "E;" stdout "${stdout}")
-
-set(collecting 0)
 set(generators)
-foreach(eline ${stdout})
-  string(REGEX REPLACE "^(.*)E$" "\\1" line "${eline}")
-  if(collecting AND NOT line STREQUAL "")
-    if(line MATCHES "=")
-      string(REGEX REPLACE "^  (.+)= (.*)$" "\\1" gen "${line}")
-      if(gen MATCHES "[A-Za-z]")
-        string(REGEX REPLACE "^(.*[^ ]) +$" "\\1" gen "${gen}")
-        if(gen)
-          set(generators ${generators} ${gen})
-        endif()
-      endif()
-    else()
-      if(line MATCHES "^  [A-Za-z0-9]")
-        string(REGEX REPLACE "^  (.+)$" "\\1" gen "${line}")
-        string(REGEX REPLACE "^(.*[^ ]) +$" "\\1" gen "${gen}")
-        if(gen)
-          set(generators ${generators} ${gen})
-        endif()
-      endif()
+string(REGEX MATCHALL [["name":"[^"]+","platformSupport"]] generators_json "${stdout}")
+foreach(gen_json IN LISTS generators_json)
+  if("${gen_json}" MATCHES [["name":"([^"]+)"]])
+    set(gen "${CMAKE_MATCH_1}")
+    if(NOT gen MATCHES " (Win64|IA64|ARM)$")
+      list(APPEND generators "${gen}")
     endif()
   endif()
-  if(line STREQUAL "The following generators are available on this platform:")
-    set(collecting 1)
-  endif()
 endforeach()
+list(REMOVE_DUPLICATES generators)
 
 # Also call with one non-existent generator:
 #
-- 
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